Added task to set dialog title

should now be able to set dialog titles explicitly from xml. If no
dialog title is specified, the engine will use the application title
instead.
Framed button should now allow sub captions

updated framed button to allow for both a main caption and a
sub-caption.  Should be able to specify font-face, size, alignment, etc.
for captions.
fixed issue with close button

fixed an issue that was preventing the close button from working
correctly in some situations.
fixed content xml to reflect button changes